Quote from Martinghoul:
A trade's positive expected value isn't necessary and sufficient for the trade to be a good one.
You are correct, but it is often a good starting point. I surmise that everyone on this message board will be aware of this most elemental equation: Expectancy = (Probability of Win * Average Win) â (Probability of Loss * Average Loss). I aver that although it does not guarantee success, your trading system should begin a positive expectancy. The other half of the picture of course, is risk management. The natural bias that most traders have is to be keen for high probability systems with high reliability. That is regarding the topic at hand, that is premium selling. Premium selling often delivers high probability and high reliability, particularly in this market. Traders are too focused on the bias that you need to be right. As students, it is taught in school that 94 percent or better is an A and 60 or below is an F. Nothing below a C+ is countenanced. Everyone is looking for high reliability entry systems, but it is expectancy that is the key. Of course, you cannot ignore sagacious risk management.
I have had persistent success over long periods of time evolving my education in the markets, and it involved constantly testing trading ideas and quantifying them. I suggest anyone following this thread to really take a hard look at their trading and ask if it is quantifiable. Many think and convince themselves they have a system, but they have really never tested their ideas over a statistically significant time period. If anyone gathers anything from this thread, please do take care to make certain you have thoroughly tested your ideas. Too many traders execute on just blind hunches relying on flimsy technical analysis while making many Type I mistakes (which I term as excessive credulity). The persistent premium selling has delivered success with respect to both high probability and high reliability for many years running. As this trend persists, what is so perilous is that traders obviate the need for risk management. This behavior, while dangerous, is understandable and predictable. In such times of peace, the army stops producing shields, arms, and defenses.
I am reminded of this time in the markets because it shares a frontier with the time I had my last difficulty in the markets back in 2007. The markets were dancing a similar waltz, and I lost a modicum of money because I found myself ill-prepared. I was short premium and short volatility. As I like to point out, "The mouse with one hole is quickly cornered." Right now, as I look out into the horizon, far too many speculators have no safety harnesses belted. They have nary a single hole for escape. The climbing of the mountain has been so facile, they left their safety equipment at the last mountain camp at the lower altitude. Where I made my mistake before, I see the same setup unfolding. This I identify with the following: âThe Bull Market Syndrome. People, when they are met with success, take personal credit for it (bull markets breed geniuses), and when they are met with failure, blame bad luck.â I share that I procured this past definition from a favorite website of mine,
www.dailyspeculations.com, on a piece submitted by Ralph Vince. It is a site by Victor Niederhoffer. I recommend others to peruse the site from time to time, for education and wisdom. Rest assured that as of today, my own money and those of my clients' are not in the same position as back in 2007. From, a fellow trader.